São Borja climate — normals and trends

Q: What is the climate of São Borja?

São Borja has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 20.7 °C and it receives 1,672 mm of precipitation per year.

Q: What is the hottest day ever recorded in São Borja?

The hottest day measured in São Borja between 1940 and 2025 was 16 November 1985, reaching 42.8 °C.

Q: What is the coldest day in São Borja?

The coldest day measured in São Borja between 1940 and 2025 was 14 June 1967, at -2.2 °C.

Q: Does it snow in São Borja?

Almost never: São Borja sees virtually no snow, with about 0 frost days per year.

Q: Has the climate of São Borja warmed?

Yes: São Borja warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.

Q: What is the wettest day in São Borja?

The wettest day measured in São Borja between 1940 and 2025 was 12 May 1940, with 141 mm of rain in 24 hours.

Q: What was the windiest day in São Borja?

The windiest day measured in São Borja between 1940 and 2025 was 29 April 1992, with winds reaching 55.4 km/h.

Q: What is the warmest month in São Borja?

The warmest month in São Borja is January (26.4 °C on average); the coldest is July (14.9 °C).

Q: How much does it rain in São Borja?

São Borja receives on average 1,672 mm of precipitation per year, spread over about 119 rainy days.

Q: Is it sunny in São Borja?

São Borja gets on average 9.2 hours of sunshine per day, roughly 3,358 hours per year over 1940-2025.

São Borja (Brazil) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 20.7 °C and it receives 1,672 mm of precipitation per year.

These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.

The warmest month is January (26.4 °C on average) and the coldest is July (14.9 °C). Rainfall peaks in October.

São Borja averages 0 frost days, 97 hot days (≥ 30 °C) and 119 rainy days per year.

São Borja has warmed by +0.8 °C between 1940 and 2025, or +0.09 °C per decade. This trend is statistically significant.

The hottest day of the period reached 42.8 °C (on 16 November 1985) and the coldest -2.2 °C (on 14 June 1967).

Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.

Climate normals · ERA5

São BorjaRio Grande do Sul

coords: -28.66°, -56.00°
period: 1940–2025 · 86 yrs

CfaHumid subtropicalWarmest monthJanuaryColdest monthJulyWettest monthOctoberDriest monthJuly

Mean daily temperature

20.7°C

Average daily high

25.9°C

Average daily low

16.1°C

Annual rainfall

1,672mm

Sunshine / day

9.2h

Mean relative humidity

74%

Average peak wind

17.8km/h

Seasonal range

11.5°C

Frost days (< 0 °C)

0 d/yr

Hot days (≥ 30 °C)

97 d/yr

Rainy days (≥ 1 mm)

119 d/yr

Annual snowfall

0.0 cm

Average feels-like high

27.3 °C

Average feels-like low

15.8 °C

Average peak gust

33.6 km/h

Tropical nights (≥ 20 °C)

100 d/yr

Solar radiation

17.2 MJ/m²

Has the climate changed?

One stripe per year, 1940 to 2025

+0.8 °C

since 1940

+0.1 °C per decade · r² = 0.16 · p = < 0.001

19402025

Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).

A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.

Records for the period

Hottest day

42.8 °C

16 November 1985

Coldest day

-2.2 °C

14 June 1967

Wettest day

141 mm

12 May 1940

Windiest day

55.4 km/h

29 April 1992

Strongest gust

123.1 km/h

13 December 1997

Hottest feels-like

45.5 °C

16 November 1985

Coldest feels-like

-6.0 °C

14 June 1967

Sunniest day

13.7 h

9 January 2025

Year	Hottest day	Coldest day	Annual mean	Rainfall	Hot days	Frost days
2025	39.4 °C5 February 2025	-0.6 °C1 July 2025	20.9 °C	1,753 mm	118	1
2024	37.8 °C12 February 2024	1.0 °C9 July 2024	21.4 °C	1,619 mm	115	0
2023	39.7 °C12 February 2023	2.8 °C18 July 2023	21.8 °C	1,653 mm	121	0
2022	40.3 °C13 January 2022	1.4 °C11 June 2022	20.8 °C	1,101 mm	120	0
2021	38.5 °C11 January 2021	1.0 °C30 July 2021	20.7 °C	1,152 mm	115	0
2020	39.3 °C14 March 2020	-0.9 °C21 August 2020	21.2 °C	1,008 mm	138	1
2019	37.9 °C1 October 2019	0.0 °C7 July 2019	21.3 °C	1,682 mm	104	0
2018	37.5 °C11 December 2018	1.3 °C17 June 2018	21.0 °C	1,389 mm	116	0
2017	39.4 °C16 December 2017	0.4 °C18 July 2017	21.7 °C	1,888 mm	117	0
2016	38.9 °C24 January 2016	0.4 °C12 June 2016	20.6 °C	1,464 mm	105	0
2015	35.0 °C31 August 2015	2.2 °C12 September 2015	21.3 °C	2,104 mm	101	0
2014	39.4 °C11 February 2014	2.6 °C25 July 2014	21.4 °C	2,041 mm	110	0
2013	39.9 °C25 December 2013	1.9 °C22 July 2013	20.5 °C	1,482 mm	104	0
2012	39.7 °C19 February 2012	-0.6 °C7 June 2012	21.8 °C	1,361 mm	140	2
2011	39.6 °C20 December 2011	0.5 °C5 July 2011	21.1 °C	1,497 mm	119	0
2010	38.1 °C7 February 2010	1.6 °C13 July 2010	20.7 °C	1,632 mm	113	0
2009	37.5 °C2 November 2009	-0.9 °C25 July 2009	20.7 °C	1,638 mm	122	2
2008	39.6 °C21 December 2008	1.0 °C16 June 2008	20.8 °C	1,310 mm	118	0
2007	37.9 °C22 December 2007	0.2 °C12 July 2007	20.6 °C	1,819 mm	131	0
2006	39.8 °C8 January 2006	1.6 °C31 July 2006	21.5 °C	1,470 mm	133	0
2005	39.0 °C8 January 2005	2.6 °C20 July 2005	21.3 °C	1,282 mm	128	0
2004	37.6 °C15 December 2004	0.2 °C11 July 2004	20.8 °C	1,171 mm	125	0
2003	37.7 °C11 November 2003	0.7 °C10 July 2003	20.7 °C	1,988 mm	93	0
2002	38.8 °C10 March 2002	1.0 °C25 June 2002	21.1 °C	2,546 mm	113	0
2001	37.7 °C20 December 2001	0.7 °C28 July 2001	21.3 °C	1,968 mm	107	0
2000	38.2 °C8 January 2000	-1.9 °C20 July 2000	20.3 °C	1,984 mm	100	2
1999	38.4 °C27 January 1999	1.4 °C15 August 1999	20.7 °C	1,623 mm	124	0
1998	36.5 °C21 January 1998	2.7 °C25 June 1998	20.3 °C	2,426 mm	78	0
1997	36.7 °C7 January 1997	0.0 °C28 June 1997	21.2 °C	2,027 mm	110	0
1996	38.9 °C10 January 1996	-2.1 °C29 June 1996	20.3 °C	1,820 mm	96	2
1995	40.6 °C17 December 1995	-1.4 °C5 August 1995	20.7 °C	1,692 mm	102	1
1994	39.4 °C20 January 1994	-1.7 °C10 July 1994	21.1 °C	1,844 mm	101	1
1993	37.6 °C3 December 1993	1.2 °C1 June 1993	20.3 °C	1,802 mm	96	0
1992	37.1 °C8 February 1992	0.2 °C17 July 1992	20.0 °C	1,608 mm	95	0
1991	38.3 °C20 January 1991	-1.3 °C2 August 1991	20.9 °C	1,583 mm	104	3
1990	37.0 °C14 November 1990	0.7 °C28 July 1990	20.2 °C	2,065 mm	90	0
1989	37.5 °C18 January 1989	0.1 °C6 July 1989	20.4 °C	1,479 mm	105	0
1988	39.6 °C12 January 1988	0.2 °C25 July 1988	20.2 °C	1,390 mm	112	0
1987	38.0 °C1 December 1987	0.4 °C24 June 1987	20.5 °C	2,014 mm	102	0
1986	39.6 °C7 January 1986	3.7 °C22 July 1986	21.5 °C	2,525 mm	110	0
1985	42.8 °C16 November 1985	1.5 °C11 July 1985	21.6 °C	1,689 mm	126	0
1984	37.8 °C7 January 1984	0.6 °C28 June 1984	20.6 °C	2,563 mm	102	0
1983	38.8 °C27 December 1983	1.3 °C7 June 1983	20.4 °C	1,862 mm	106	0
1982	38.5 °C27 January 1982	2.8 °C29 June 1982	21.0 °C	1,704 mm	104	0
1981	35.4 °C5 January 1981	-0.9 °C18 June 1981	20.9 °C	1,424 mm	111	2
1980	38.5 °C9 February 1980	-0.9 °C31 July 1980	20.9 °C	1,721 mm	119	1
1979	39.1 °C5 February 1979	1.3 °C15 June 1979	20.2 °C	1,591 mm	92	0
1978	37.8 °C23 December 1978	0.9 °C1 June 1978	20.6 °C	1,301 mm	112	0
1977	36.8 °C23 October 1977	2.8 °C2 September 1977	21.3 °C	1,855 mm	108	0
1976	37.7 °C14 December 1976	0.4 °C10 July 1976	19.7 °C	1,297 mm	95	0
1975	37.2 °C15 November 1975	-2.0 °C18 July 1975	20.0 °C	1,702 mm	77	1
1974	37.9 °C18 November 1974	0.8 °C13 June 1974	20.2 °C	1,471 mm	94	0
1973	36.6 °C12 January 1973	1.4 °C7 September 1973	20.2 °C	2,249 mm	93	0
1972	39.7 °C7 February 1972	1.1 °C1 September 1972	20.5 °C	2,648 mm	82	0
1971	40.5 °C30 December 1971	0.5 °C17 June 1971	20.2 °C	1,361 mm	97	0
1970	38.8 °C22 January 1970	0.4 °C2 July 1970	20.7 °C	1,799 mm	106	0
1969	36.7 °C21 December 1969	0.0 °C2 August 1969	20.2 °C	1,838 mm	85	0
1968	38.8 °C19 January 1968	3.3 °C21 June 1968	20.6 °C	1,427 mm	115	0
1967	37.2 °C18 December 1967	-2.2 °C14 June 1967	20.5 °C	2,156 mm	82	1
1966	35.5 °C11 December 1966	0.8 °C6 August 1966	19.7 °C	1,879 mm	64	0
1965	38.5 °C22 January 1965	0.7 °C11 July 1965	20.3 °C	1,524 mm	89	0
1964	37.5 °C24 December 1964	2.0 °C29 June 1964	19.8 °C	944 mm	85	0
1963	38.5 °C2 January 1963	0.6 °C6 August 1963	20.8 °C	1,479 mm	100	0
1962	38.5 °C25 December 1962	1.0 °C30 May 1962	19.4 °C	1,213 mm	89	0
1961	37.3 °C31 January 1961	-0.2 °C15 June 1961	20.8 °C	1,719 mm	95	1
1960	37.8 °C24 December 1960	0.6 °C9 July 1960	20.3 °C	1,285 mm	97	0
1959	34.9 °C21 January 1959	4.5 °C10 June 1959	20.3 °C	2,309 mm	67	0
1958	37.3 °C7 January 1958	3.1 °C26 May 1958	20.3 °C	1,556 mm	71	0
1957	34.8 °C17 October 1957	0.8 °C22 July 1957	20.2 °C	1,601 mm	62	0
1956	33.3 °C5 February 1956	2.7 °C15 May 1956	19.3 °C	1,781 mm	36	0
1955	35.0 °C5 January 1955	0.1 °C8 July 1955	19.7 °C	1,483 mm	63	0
1954	34.4 °C9 December 1954	4.9 °C8 August 1954	20.2 °C	1,888 mm	53	0
1953	37.3 °C5 January 1953	2.0 °C20 July 1953	21.1 °C	1,851 mm	70	0
1952	36.8 °C27 December 1952	4.2 °C19 June 1952	20.5 °C	1,409 mm	73	0
1951	32.9 °C14 January 1951	4.8 °C6 July 1951	20.3 °C	1,559 mm	38	0
1950	33.8 °C22 November 1950	1.3 °C11 July 1950	20.3 °C	1,331 mm	67	0
1949	36.5 °C20 December 1949	1.9 °C19 July 1949	20.3 °C	1,304 mm	76	0
1948	33.8 °C12 December 1948	2.8 °C9 August 1948	20.2 °C	2,178 mm	29	0
1947	34.5 °C29 November 1947	0.4 °C10 July 1947	20.3 °C	1,624 mm	47	0
1946	35.1 °C23 January 1946	2.1 °C21 July 1946	20.3 °C	1,918 mm	51	0
1945	37.6 °C10 January 1945	0.5 °C24 June 1945	21.4 °C	1,265 mm	91	0
1944	37.1 °C21 December 1944	1.4 °C27 June 1944	21.8 °C	1,572 mm	86	0
1943	40.9 °C17 January 1943	4.9 °C22 August 1943	21.8 °C	833 mm	114	0
1942	37.9 °C29 December 1942	0.9 °C5 July 1942	20.6 °C	1,130 mm	97	0
1941	35.0 °C16 February 1941	2.4 °C26 June 1941	20.7 °C	1,795 mm	69	0
1940	35.5 °C8 March 1940	4.8 °C9 August 1940	20.7 °C	1,820 mm	95	0

Normals computed over complete calendar years 1940–2025.

A specific year

Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?

Year

Across the whole year

Average daily high

26.5 °C

+0.6 °C

Hot days (≥ 30 °C)

118 d/yr

+21

Frost days (< 0 °C)

1 d/yr

Annual rainfall

1753 mm

+81 mm

Month by month

	High	vs. normal	Precipitation	vs. normal
Jan	33.9 °C	+2.3 °C	39 mm	-127 mm
Feb	35.1 °C	+4.4 °C	86 mm	-50 mm
Mar	32.0 °C	+2.6 °C	80 mm	-44 mm
Apr	25.5 °C	-0.4 °C	56 mm	-97 mm
May	23.5 °C	+1.1 °C	299 mm	+164 mm
Jun	17.1 °C	-2.9 °C	183 mm	+54 mm
Jul	20.3 °C	+0.3 °C	46 mm	-60 mm
Aug	21.4 °C	-0.4 °C	169 mm	+58 mm
Sep	23.5 °C	0.0 °C	259 mm	+105 mm
Oct	25.9 °C	-0.1 °C	189 mm	+9 mm
Nov	29.1 °C	+0.5 °C	81 mm	-65 mm
Dec	30.7 °C	-0.3 °C	267 mm	+135 mm

The year's extremes

Hottest day

39.4 °C

5 Feb 2025

Coldest day

-0.6 °C

1 Jul 2025

Wettest day

70.9 mm

9 May 2025

Windiest day

36.7 km/h

19 Aug 2025

Strongest gust

73.8 km/h

7 Nov 2025

Hottest feels-like

44.5 °C

9 Feb 2025

Coldest feels-like

-3.9 °C

1 Jul 2025

Sunniest day

13.7 h

9 Jan 2025

What was the weather like that day?

Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.

Date

Frequently asked questions

What is the climate of São Borja?

São Borja has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 20.7 °C and it receives 1,672 mm of precipitation per year.

What is the hottest day ever recorded in São Borja?

The hottest day measured in São Borja between 1940 and 2025 was 16 November 1985, reaching 42.8 °C.

What is the coldest day in São Borja?

The coldest day measured in São Borja between 1940 and 2025 was 14 June 1967, at -2.2 °C.

Does it snow in São Borja?

Almost never: São Borja sees virtually no snow, with about 0 frost days per year.

Has the climate of São Borja warmed?

Yes: São Borja warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.

What is the wettest day in São Borja?

The wettest day measured in São Borja between 1940 and 2025 was 12 May 1940, with 141 mm of rain in 24 hours.

What was the windiest day in São Borja?

The windiest day measured in São Borja between 1940 and 2025 was 29 April 1992, with winds reaching 55.4 km/h.

What is the warmest month in São Borja?

The warmest month in São Borja is January (26.4 °C on average); the coldest is July (14.9 °C).

How much does it rain in São Borja?

São Borja receives on average 1,672 mm of precipitation per year, spread over about 119 rainy days.

Is it sunny in São Borja?

São Borja gets on average 9.2 hours of sunshine per day, roughly 3,358 hours per year over 1940-2025.

Are there tropical nights in São Borja?

Yes: São Borja has on average 100 tropical nights per year (temperature staying above 20 °C), over 1940-2025.

What was the most extreme apparent temperature in São Borja?

In São Borja, between 1940 and 2025, the highest apparent temperature reached 45.5 °C on 16 November 1985, and the lowest was -6.0 °C on 14 June 1967.

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